/*
 * Zed Attack Proxy (ZAP) and its related class files.
 *
 * ZAP is an HTTP/HTTPS proxy for assessing web application security.
 *
 * Copyright 2012 The ZAP Development Team
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.zaproxy.zap.extension.httppanel.view.impl.models.http.response;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;
import org.parosproxy.paros.network.HttpHeader;
import org.zaproxy.zap.extension.httppanel.view.impl.models.http.AbstractHttpStringHttpPanelViewModel;
import org.zaproxy.zap.extension.httppanel.view.impl.models.http.HttpPanelViewModelUtils;

public class ResponseBodyStringHttpPanelViewModel extends AbstractHttpStringHttpPanelViewModel {

    @Override
    public String getData() {
        if (httpMessage == null) {
            return "";
        }

        if (HttpHeader.GZIP.equals(
                httpMessage.getResponseHeader().getHeader(HttpHeader.CONTENT_ENCODING))) {
            // Uncompress gziped content
            try {
                ByteArrayInputStream bais =
                        new ByteArrayInputStream(httpMessage.getResponseBody().getBytes());
                GZIPInputStream gis = new GZIPInputStream(bais);
                InputStreamReader isr = new InputStreamReader(gis);
                BufferedReader br = new BufferedReader(isr);
                StringBuilder sb = new StringBuilder();
                String line = null;
                while ((line = br.readLine()) != null) {
                    sb.append(line);
                }
                br.close();
                isr.close();
                gis.close();
                bais.close();
                return sb.toString();
            } catch (IOException e) {
                // this.log.error(e.getMessage(), e);
                System.out.println(e);
            }
        }

        return httpMessage.getResponseBody().toString();
    }

    @Override
    public void setData(String data) {
        if (httpMessage == null) {
            return;
        }
        if (HttpHeader.GZIP.equals(
                httpMessage.getResponseHeader().getHeader(HttpHeader.CONTENT_ENCODING))) {
            // Recompress gziped content
            try {
                ByteArrayOutputStream baos = new ByteArrayOutputStream();
                GZIPOutputStream gis = new GZIPOutputStream(baos);
                BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(gis, "UTF-8"));
                bw.write(data);
                bw.close();
                gis.close();
                baos.close();
                httpMessage.getResponseBody().setBody(baos.toByteArray());
                HttpPanelViewModelUtils.updateResponseContentLength(httpMessage);
            } catch (IOException e) {
                // this.log.error(e.getMessage(), e);
                System.out.println(e);
            }
        } else {
            httpMessage.getResponseBody().setBody(data);
            HttpPanelViewModelUtils.updateResponseContentLength(httpMessage);
        }
    }
}
